Claims
- 1. A broadband waveguide lens antenna having a multiplicity of spaced juxtaposed electromagnetic waveguide plates and having an aperture phase error characteristic ##EQU13## wherein R=focal length, .psi.=angle at intersection of general ray and antenna axis, S=lens thickness at point of general ray passage, V=lens thickness along its axis, .eta.=lens refractive axis, V=zone number, .lambda.=free space wavelength, each waveguide plate being formed to have multiple steps, each said step defining a zone and being configured and dimensioned such that the componenets of phase error due to waveguide plate dispension .epsilon..sub.n is equal to and opposite the components of phase error due to waveguide plate geometric configuration .epsilon..sub.u for each said zone, .epsilon..sub.n being defined as .epsilon..sub.n =(S-V) (.eta..sub.o -.eta.) (360/.lambda.) degrees, and .epsilon..sub.j being defined as .epsilon..sub.j (.lambda.-.lambda..sub.o) (360/.lambda.) degrees, wherein .eta..sub.o =lens refractive index at design frequency, and .lambda..sub.o =freespace wavelength at the design frequency.
STATEMENT OF GOVERNMENT INTEREST
The invention described herein may be manufactured and used by or for the Government for governmental purposes without the payment of any royalty thereon.
US Referenced Citations (5)